Browsing by Keywords "Phase transitions"
Now showing items 1-20 of 23
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Characterization and stability of Janus TiXY (X/Y = S, Se, and Te) monolayers
(American Chemical Society, 2019)The realization of Janus MoSSe monolayers has brought two-dimensional (2D), ternary transition metal dichalcogenides (TMDs) into focus. The addition of a third element can lead to superior properties, hence extensive ... -
Deterministic phase transitions and self-organization in logistic cellular automata
(American Physical Society, 2019)We present a simple extension in which a single parameter tunes the dynamics of cellular automata (CA) by consequently expanding their discrete state space into a Cantor set. Such an implementation serves as a potent ... -
Effect of the superconductivity transition on the response of YBCO edge transition bolometers
(2003)Dependence of the phase and magnitude of the response of Y-Ba-Cu-O edge transition bolometers on the superconducting transition is studied. The responses of both large and small area devices were investigated and several ... -
Effective electron-electron interactions and magnetic phase transition in a two-dimensional electron liquid
(Elsevier B.V., 2007)We investigate the spin-dependent effective electron-electron interactions in a uniform system of two-dimensional electrons to understand the spontaneous magnetization expected to occur at very low density. For this purpose, ... -
Effects of milling and annealing on formation and structural characterization of nanocrystalline intermetallic compounds from Ni-Ti elemental powders
(2012)Nickel and Titanium elemental powders with a nominal composition Ni-50 at.%Ti were mechanical alloyed in a planetary high-energy ball mill in different milling conditions (5, 10, 20, 40 and 60 h). The investigation revealed ... -
Electric-field-induced reversible phase transitions in a spontaneously ion-Intercalated 2D metal oxide
(American Chemical Society, 2021-05-12)Electric field driven reversible phase transitions in two-dimensional (2D) materials are appealing for their potential in switching applications. Here, we introduce potassium intercalated MnO2 as an exemplary case. We ... -
Electronic structure, insulator-metal transition and superconductivity in K-ET2X salts
(1998)The electronic structure and superconductivity of layered organic materials based on the bis(ethylenedithio)tetrathiafulvalene molecule (BEDT-TTF, hereafter ET) with essential intra-ET correlations of electrons are analysed. ... -
Existence of a metallic phase in a 1D Holstein-Hubbard model at half filling
(Elsevier B.V., 2007)The one-dimensional half-filled Holstein-Hubbard model is studied using a series of canonical transformations including phonon coherence effect that partly depends on the electron density and is partly independent and also ... -
Free expansion of two-dimensional condensates with a vortex
(Institute of Physics Publishing, 2003)We study the free expansion of a pancake-shaped Bose-condensed gas, which is initially trapped under harmonic confinement and containing a vortex at its centre. In the case of a radial expansion holding the axial confinement ... -
Freezing transition of the vortex liquid in a layered superconductor
(Elsevier Science Publishers B.V., 2001)The self-consistent theory of Singwi, Tosi, Land, and Sjolander is used to describe the liquid-solid phase in a layered superconductor in the limit of weak interplane correlation effects as would be applicable to BSCCO ... -
Lipid melting transitions involve structural redistribution of interfacial water
(American Chemical Society, 2021-11-03)Morphological and gel-to-liquid phase transitions of lipid membranes are generally considered to primarily depend on the structural motifs in the hydrophobic core of the bilayer. Structural changes in the aqueous headgroup ... -
Low-temperature phase transitions in TlGaS2 layer crystals
(Pergamon Press, 1993)Polarized Raman scattering spectra of TlGaS2 layer crystals have been studied for the first time as a function of temperature between 8.5 and 295 K. No evidence for a soft mode behaviour has been found. The anomalies ... -
Low-temperature photoluminescence spectra of TlInxGa1-xS2 layer mixed crystals
(Pergamon Press, 1995)Low-temperature photoluminescence spectra of TlInS2, TlIn0.95Ga0.05S2 and TlIn0.8Ga0.2S2 layer crystals were studied in the temperature range 14-220 K. The temperature dependencies of bands 2.374 eV (A), 2.570 eV (E) and ... -
Metal-insulator transitions in bilayer electron-hole systems in transition metal dichalcogenides
(American Physical Society, 2021-11-29)We investigated metal-insulator transitions for double-layer two-dimensional electron-hole systems in transition metal dichalcogenides stacked on opposite sides of thin layers of boron nitride. The interparticle interaction ... -
Pairing and vortex lattices for interacting fermions in optical lattices with a large magnetic field
(The American Physical Society, 2010)We study the structure of a pairing order parameter for spin-1/2 fermions with attractive interactions in a square lattice under a uniform magnetic field. Because the magnetic translation symmetry gives a unique degeneracy ... -
Phase transformation during mechano-synthesis of nanocrystalline/amorphous Fe–32Mn–6Si alloys
(Elsevier, 2013)Mechano-synthesis of Fe-32Mn-6Si alloy by mechanical alloying of the elemental powder mixtures was evaluated by running the ball milling process under an inert argon gas atmosphere. In order to characterize the as-milled ... -
Phase transitions and renormalization-group theory
(1989-07)The study of critical phenomena targets the qualitatively new phenomena that occur through the interactions of very large numbers of degrees of freedom. Such situations are typically realized near the onset of the transition ... -
Phonon squeezing in superconducting borocarbides
(Elsevier BV * North-Holland, 1994)The recently discovered superconductor LuNi2B2C is investigated in the context of strong electron-electron correlations modulated by a squeezed phonon mode propagating in the perpendicular direction to the layers with ... -
Radiative donor-acceptor pair recombination in TlInS2 single crystals
(Institute of Physics Publishing, 1999)Photoluminescence (PL) spectra of TlInS2 layered single crystals were investigated in the 500-860 nm wavelength region and in the 11.5-100 K temperature range. We observed two PL bands centred at 515 nm (2.41 eV, A band) ... -
Solid or liquid? Solidification of a nanoconfined liquid under nonequilibrium conditions
(American Chemical Society, 2006)There has been a long-standing debate about the physical state and possible phase transformations of confined liquids. In this report, we show that a model-confined liquid can behave both as a Newtonian liquid with very ...
